Accounting Policies - Restricted Cash (Details) - USD ($) $ in Millions		Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Cash and Cash Equivalents		$ 1,030	$ 1,539	$ 1,006
Restricted Cash	[1]	104		32
Total Cash, Cash Equivalents and Restricted Cash		$ 1,134	$ 1,624	$ 1,038	$ 974

[1] Includes Cooper Tire restricted cash of $50 million at June 30, 2021.